package com.bw.springcloud.controller;

import com.bw.springcloud.entity.CommonResult;
import com.bw.springcloud.entity.Payment;
import com.bw.springcloud.lb.LoadBalancer;
import com.netflix.loadbalancer.IRule;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.HashMap;
import java.util.List;

/**
 * 类描述
 *
 * @author Mr.Wu
 * @create 2020-05-05
 */
@RestController
@Slf4j
public class OrderController {
	private static final String PAYMENT_URL="http://CLOUD-PROVIDER-SERVICE";

	@Resource
	private RestTemplate restTemplate;

	@Resource
	private LoadBalancer loadBalancer;


	@Resource
	private DiscoveryClient discoveryClient;


	@GetMapping("/consumer/payment/create")
	public CommonResult<Payment> create(Payment payment){
		// httpclient
		return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment, CommonResult.class);
	}

	@GetMapping("/consumer/payment/get/{id}")
	public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
		return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
	}


	@GetMapping("/consumer/payment/getEntity/{id}")
	public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
		ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
		if(entity.getStatusCode().is2xxSuccessful()){
			return entity.getBody();

		} else {
			return new CommonResult(400,"请求失败",null);
		}

	}

	@GetMapping("/consumer/payment/lb")
	public String getPaymentLb() {
		// 通过容器中的 discoveryClient和服务名来获取服务集群
		List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PROVIDER-SERVICE");
		if(instances == null || instances.size() <= 0) {
			return null;
		}
		// 传入服务集群来计算出获取具体的服务实例
		ServiceInstance serviceInstance = loadBalancer.instances(instances);
		URI uri = serviceInstance.getUri();
		return restTemplate.getForObject(uri+"/payment/lb",String.class);
	}




}
